code: def test_line_series(xs, ys, mock_run):
      _ = mock_run(settings={"mode": "offline"})
      line_series_plt = line_series(xs, ys)
      assert line_series_plt.table.data[0] == [xs[0], "key_0", ys[0][0]]
      assert line_series_plt.table.data[1] == [xs[1], "key_0", ys[0][1]]
  
      if len(ys) == 2:
          assert line_series_plt.table.data[2] == [
              xs[0],
              "key_1",
              ys[1][0],
          ]
          assert line_series_plt.table.data[3] == [
              xs[1],
              "key_1",
              ys[1][1],
          ]
  
file_path: wandb/tests/pytest_tests/unit_tests/test_plot.py
imports: import pytest
  from sklearn.naive_bayes import MultinomialNB
  from wandb.plot import confusion_matrix, line_series, pr_curve, roc_curve
label_desc: Use image node_id 7 for calling a global function with example usage: test_line_series(xs, ys, mock_run) without return types